> Now I'm really getting close, but this error pops up when I try to use a
> key-binding on a non managed resource:
>
> Failed to get SVNTeamProvider for 'L/wwee/.project'

It sounds like you are saying that you are inside a project that is either
not connected to SVN, or perhaps is connected to CVS or some other system.
You take the keyboard shortcut to do an SVN Commit.

1) As you indicated, ideally something would be done in Eclipse to
disable to keyboard shortcut in this scenarion.

2) Failing that, it seems like things are behaving correctly.

Have you looked at what CVS is doing? It could be that it is activated
too but is just "swalloing" the error so that you do not know it was ever
invoked. If you could figure out that the latter was happening, then
maybe you could at least stop trying to figure out how to do #1.